Bulletins (Ohio Geological Survey)
Bulletins are original research of a comprehensive nature, such as the geology of a county, the geology of a geologic system or major geologic unit, or the paleontology of a phylum in a system. Starting with Bulletin 50, the prefix "Fourth Series" has been dropped.
Items in this collection are copyright-protected and are reproduced here with permission or under the Fair Use provision of copyright law for research and educational purposes. Permission must be obtained from the State of Ohio, Department of Natural Resources to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to the law. NOTE: Some items may be obtained in published paper format by contacting the Ohio Geological Survey Geologic Records Center at (614) 265-6576 or Geo.Survey@dnr.state.oh.us.